My son Kevin during the Summer Olympics when he was 4.........
"I want to see the 'pepper salts'...HUH????...I asked him what he meant and he said, "pepper salts, you know, like the ladies do"...
He was talking about the Ladies Gymnastics doing "SOMERSAULTS", aka "Pepper Salts"....

It was too cute and he would KILL ME if he knew I posted this....
Another from Kevin around the same age....it was time to eat dinner and he said, "Cook spank, time to eat"...HUH???...it wasn't until many years later when I saw a commercial for Cook's Brand Ham Shank that I figured that he was referring to that commercial........lol...
Another one from my son Mark when he was 3 or 4.....I want 'fork chops'....aka PORK CHOPS...lol...he also had called them 'see pops'....lol...
That's all I can think of for now...I'll have to see if I can come up with any more....hehehehehehe....
Good idea, Jamie!!!.....